CVE-2022-30522 is a high-severity vulnerability affecting Apache HTTP Server version 2.4.53, which allows for excessive memory allocation when configured to perform transformations using mod_sed. This configuration can trigger an abort condition, leading to a denial of service. Organizations utilizing this version of Apache HTTP Server are at risk, as the potential for service disruption is significant.
The CVSS score of 7.5 indicates a high severity level, primarily due to the availability impact which could result in service downtime. The vulnerability is classified as having a network attack vector, low complexity, and does not require any user interaction or privileges. This means attackers can exploit it remotely without any special conditions.
Given the potential impact of this vulnerability, organizations should prioritize patching immediately. The risk to organizations includes operational disruption, loss of availability, and potential reputational damage.
As of now, there are no known exploits or public proofs of concept available for this vulnerability, but this does not diminish the urgency for remediation. Organizations should remain vigilant and consider implementing additional monitoring and defensive measures.
Vulnerability Details
The vulnerability is specifically present in Apache HTTP Server 2.4.53 when configured with mod_sed to handle large input transformations. The official description of the vulnerability states: 'If Apache HTTP Server 2.4.53 is configured to do transformations with mod_sed in contexts where the input to mod_sed may be very large, mod_sed may make excessively large memory allocations and trigger an abort.'
The CVSS 3.1 score of 7.5 indicates a high threat, emphasizing a high availability impact while confidentiality and integrity are unaffected. The vulnerability is categorized under CWE-789 and CWE-770.
This vulnerability affects multiple products, including the Apache HTTP Server, Fedora 35 and 36, and NetApp's clustered data ontap.
Technical Analysis
The root cause of the vulnerability stems from how mod_sed processes large inputs. When faced with unexpectedly large input sizes, mod_sed attempts to allocate more memory than is feasible, potentially leading to an application crash.
The attack vector for this vulnerability is categorized as network-based, allowing for remote exploitation. The complexity of the attack is low, meaning that no specialized skills or conditions are required for an attacker to exploit the vulnerability. Importantly, no user interaction is needed, making it easier for attackers to trigger the condition.
In terms of impact assessment, while there is no confidentiality or integrity impact, the availability impact is significant, potentially causing service outages. Organizations should be cautious and ensure that their configurations do not expose them to this risk.
Risk & Impact Analysis
Organizations utilizing vulnerable versions of Apache HTTP Server should assess the potential risks associated with this vulnerability. The immediate concern is the potential for denial of service, which can disrupt business operations, especially for web-based applications reliant on the Apache server.
The blast radius for this vulnerability can be extensive, affecting any services hosted on the impacted server. As organizations increasingly rely on web services, the implications of downtime can extend beyond immediate technical concerns to reputational damage and loss of customer trust.
Given the CVSS score of 7.5, organizations should treat this vulnerability with high urgency, ensuring it is addressed in the priority patch cycle. Failure to respond could lead to significant operational challenges.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability impacts Apache HTTP Server version 2.4.53, along with Fedora versions 35 and 36, and NetApp's clustered data ontap. Organizations should ensure they are aware of the specific versions in use and apply necessary updates.
Mitigation & Remediation
To mitigate this vulnerability, organizations should patch their Apache HTTP Server to the latest version available. Immediate updates to version 2.4.54 or later are recommended to close this vulnerability.
For those unable to apply the patch immediately, consider implementing configuration hardening to limit the size of input processed by mod_sed. Additionally, organizations should review their network controls to restrict potential attack vectors.
Organizations should validate remediation through penetration testing to identify any similar weaknesses.
Detection Guidance
Organizations should monitor logs for abnormal memory allocation patterns in mod_sed and review system stability following large input processing. Additionally, keep an eye on network traffic for unusual patterns that may suggest attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
The emergence of vulnerabilities like CVE-2022-30522 highlights the importance of maintaining regular patch management and threat modeling in web server environments. As attackers continuously seek to exploit weaknesses in widely used software like Apache, organizations must stay ahead by implementing proactive security measures.
Education and awareness for development teams regarding secure coding practices can mitigate the chances of similar vulnerabilities being introduced in the future. Investing in penetration testing methodology as part of the SDLC can yield significant benefits in identifying and remediating vulnerabilities before they can be exploited.
Finally, organizations should consider adopting a vulnerability management program to systematically address vulnerabilities and enhance overall security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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